Improvement in street-lanterns



faseplz 17( fZZeZZS N A ,522466 Z L al@ lern. 116399 Mmm JUN 27 1871PATENT OFFICE.

JOSEPH W. BARTLETT, OF NEW YORK, N. Y.

IMPROVEMENT IN STREET-LANTERNS.

Specification forming part of Letters Patent No. 116,399, dated June 27,1871.

To all whom it may concern:

Be it known that I, J osEPH W. BARTLETT, of the city, county, and Stateof New York, have invented certain Improvements in Lanterns or Lamps,designed more especially for street use, of which the following is aspecification:

The object of my invention is to produce a lan tern or lamp constructedin a simple and economical manner, which shall offer the least possibleobstruction to the outward passage of the rays of light emanating fromthe ila-me within the same, and in the placing of a reflector or ofreectors upon the said lamp in such a manner that, while they shall notobstruct the passage of the full volume of the rays of the light outwardtoward the street and surrounding territory, will yet check the passageof such ofthe rays oi' the said light which would otherwise passdirectly upward and above the lamp into space where illumination is notrequired, and reflect the same back upon the street and to thesurrounding territory where illumination is desired.

Figure 1 is au elevation of the said lamp, showing two of thebefore-mentioned reflectors in their relative positions upon said lamp.Fig. 2 is a sec tion from A to B of the lower one of the two above-namedretlectors. Fig. 3 is an elevation, showing the upper portion ofthe saidlamp with retlector placed upon the same, and made slightly concave inform.

I make the upper reilectors, or those which are placed upon the chimney,of both the convex and concave forms, as shown in Figs. l and 3.

c represents the glass, made in an elongated globular form; b, a rib orrim of glass, made upon the outer side of the glass a for the purpose ofholding and sustaining the lamp within the metal ring or frame. c is aretlector, made of metal, slightly concave in form, which is placed uponthe glass a, andheld in position by the rib b and metal ring lor framesupporting the lamp. I make this reliector, for ordinary street use, ofabout four inches in width from the inner to the outer edges. d is themetal frame supporting the lamp when used upon the ordinary post. y j'is the Ventilating-chimney, made ot' met/al, the lower part of which Isecure to the opening in the glass a by means of clasps made .from thesame. The chimney may also be secured to the glass a by means of aspring and a flange, or with indentures made upon the glass. g is ametal cap or cover placed at a proper distance for ventilation above thechimney, and held in place by straps of metal. h, Fig. 1, is areflector, made of a convex form, and is fitted upon the chimney f. Imake this reiiector, for ordinary street use, about six inches in heightfrom the lower edge, when it is itted to the chimney to the upper edge,and about fourteen inches in diameter across the top. i is a metal coverfitted upon the top of the reector h, Fig. l, for the purpose ofconducting away the water, Sto.

There are various articles which may be used upon the surfaces of thesereilectors in order to increase the reflecting power of the same, nearlyall of which I have tried in order to arrive at what was the best forall purposes and in the place where it is required in use. I nd that tocover the surface of metal with a good body of the best white paint, andenamel the same thoroughly with varnish, answers for all the purposesthe best and gives the best satisfaction.

k is a rim of metal secured to the lower part and outside of the chimneyf, placed there for the purpose of holding the outer edge of the glasset in place, and, by extending the said rim over a slight distance uponthe surface of the glass, it covers any variation or inequality whichmay occur in the size of the opening of the glass a. The clasps madeupon the lower edge ofthe chimney j' are made of a length correspondingto the width of the rim k. lis a bead made upon the lower edge of theupper part of the chimney, where it is found desirable to make the samein two parts for the purposes of packing, cleaning the glass on theinside from above, Sto. m lm. are catches, of metal, secured to the rimk, which are secured upon the bead l by passing through the openingsmade thereon, sliding the chimney around the distance for the catches tohold upon the bead Z. The two parts of the chimney may also be securedby means of a slot made in the outer part and a rivet secured upon theinner part, upon a plan somewhat similar to that used for securing thelamp in old-style handlanterns to the upper part. There are varioussimple ways by which this may be done. I make the chimneys bothways-that is, all in one, or intwo parts for disconnecting the same. 'nn, Fig. 3, show the metal bands wh ich support the chimney-cap broughtdown upon the outside of the chimney to the upper surface of thereflector h, Fig. 3, when they are carried across to the edge of thesaid reector and help to support the same in place.

Having thus described my improvements in lamps, I will merely here statethat I do not now claim of themselves the glass a with its 'rib' b andchimney f, Fig. l, that having been granted to me in Letters Patent No.103,828, dated June 7, 187 0; but

What I now claim as my invention, and desire to secure by LettersPatent, is-

1. A glass, a, having a rib, b, thereon, combined with itssupportingframe or bracket and with a reflector held to place betweensuch rib and frame, substantially as shown and described.

